tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.

tree-wide: sort includes Sort the includes accoding to the new coding style.

treewide: use the negative error codes returned by our functions Our functions return negative error codes. Do not rely on errno being set after calling our own functions.

util-lib: split out allocation calls into alloc-util.[ch]

util-lib: split our string related calls from util.[ch] into its own file string-util.[ch] There are more than enough calls doing string manipulations to deserve its own files, hence do something about it. This patch also sorts the #include blocks of all files that needed to be updated, according to the sorting suggestions from CODING_STYLE. Since pretty much every file needs our string manipulation functions this effectively means that most files have sorted #include blocks now. Also touches a few unrelated include files.

hostname: Allow comments in /etc/hostname The hostname(1) tool allows comments in /etc/hostname. Introduce a new read_hostname_config() in hostname-util which reads a hostname configuration file like /etc/hostname, strips out comments, whitespace, and cleans the hostname. Use it in hostname-setup.c and hostnamed and remove duplicated code. Update hostname manpage. Add tests. https://launchpad.net/bugs/1053048

util: split all hostname related calls into hostname-util.c

remove unused includes This patch removes includes that are not used. The removals were found with include-what-you-use which checks if any of the symbols from a header is in use.

treewide: another round of simplifications Using the same scripts as in f647962d64e "treewide: yet more log_*_errno + return simplifications".

treewide: use log_*_errno whenever %m is in the format string If the format string contains %m, clearly errno must have a meaningful value, so we might as well use log_*_errno to have ERRNO= logged. Using: find . -name '*.[ch]' | xargs sed -r -i -e \ 's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/' Plus some whitespace, linewrap, and indent adjustments.

treewide: no need to negate errno for log_*_errno() It corrrectly handles both positive and negative errno values.

treewide: auto-convert the simple cases to log_*_errno() As a followup to 086891e5c1 "log: add an "error" parameter to all low-level logging calls and intrdouce log_error_errno() as log calls that take error numbers", use sed to convert the simple cases to use the new macros: find . -name '*.[ch]' | xargs sed -r -i -e \ 's/log_(debug|info|notice|warning|error|emergency)\("(.*)%s"(.*), strerror\(-([a-zA-Z_]+)\)\);/log_\1_errno(-\4, "\2%m"\3);/' Multi-line log_*() invocations are not covered. And we also should add log_unit_*_errno().

util: introduce sethostname_idempotent Function queries system hostname and applies changes only when necessary. Also, migrate all client of sethostname to sethostname_idempotent while at it.

hostname: only suppress setting of pretty hostname if it is non-equal to the static hostname and if the static hostname is set, too https://bugzilla.redhat.com/show_bug.cgi?id=957814

honor SELinux labels, when creating and writing config files Also split out some fileio functions to fileio.c and provide a SELinux aware pendant in fileio-label.c see https://bugzilla.redhat.com/show_bug.cgi?id=881577

core: drop support for old per-distro configuration files for console, hostname, locale, timezone This simplifies the upstream system code quite a bit. If downstream distributions want to maintain compatibility with their old configuration files, they are welcome to do so, but need to maintain this as patches downstream. The burden needs to be on the distributions to maintain differences here. Our suggestion however is to just convert the old configuration files on upgrade, as multiple distributions already do.

drop Arch Linux support for reading /etc/rc.conf

remove Fedora hostname, locale, vconsole legacy file support

macro: introduce _cleanup_free_ macro for automatic freeing of scoped vars and make use of it

MeeGo: Remove build support for MeeGo distribution. The MeeGo distribution is still a supported distribution, but will probably not see an updated version of systemd anymore. Most of the development is focussing on Tizen now, and the generic support for building --with-distro=other is more than adequate enough. This patch removes the support as a custom configuration build target in systemd. People who are still building this for the MeeGo distribution should build as "other" distro.

hostname-setup: also consider (ńone) an unset hostname

hostname: if there's already a hostname set when PID 1 is invoked, don't complain

hostname-setup: move to core/